Self-measuring oil-pump.



PATBNTED DEC. 24, 1907.

ANo. 874,574.

I. B. DAVIS.

SELF MBASURING OIL PUMP.

APPLICATION FILED AUG. 3, 1907.

'2 SHEETS-SHEET 1.

Wi h1 zoons PATENTBD DB0. 24. '1907.

J. B. DAVIS. SELF MBASURING OIL PUMP.

APPLICATION FILED AUG. 3, 1907.

'2 SHEETS-SHEET 2.

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6139i h1 ma nl! Naanls PETER: cm. wmucron. n. c.

. tions between the plunger rods, one chain nected to t UNITED snr-Tas 'PATENT-OFFICE JOHN B. DAVIS, OF DAYTON, OHIO, AssIGNoR To THE NATIONAL OIL PUMP a TANK oo., OF DAYTON, oI-IIO, A CORPORATION or OHIO.

SELF-MEASURING OIL-PUMP.

Speccation of Letters Patent.

Application filed August 3,1901 Serial NO- 386|885- Patented Dec. 24, 1907.

To all rwhom 'it may concern: A l lifting chain 8 through which Beit known that I, JOIIN BQDAvIa'citizen rods are elevated. This chain passes over of the Umted States, residing at Dayton, in i two sprocket wheels 9 mounted in the head the county of Montgomery and State of Ohio, l() at the top of the machine. The head 10 the plunger have invented certain new and useful Imis supported on the sub-base 13 by .means of l provenients in Self-Measuring Oil-Pumps, legs 7 that extend down and are bolted to and I do declare the following to be a full, l said sub-base. The plunger rods 7 pass clear, and exact description of the invention, i through stuiling boxes 11- located at the subsuch as will enable others skilled in the art to l base and upon the upper portions of the which it appertains to make and use the l plunger rods there are secured by Ineans of same, reference being had to the accompany- ,l set screws 12 adjustable )ieces 10 which ing drawings, and to the letters and iigures or' may be moved to suitab e points on the reference marked thereon, which form a part plunger rods to regulate their stroke and of this specification there secured. Connected to these adjust- This inventionrelates to improvements in able pieces 10 is a draw chain S by Which self-measuring Oil pumps, and more speciicthe plunger rods are ldrawn down. This ally to the means for actuating the pistons, chain passes around a sprocket wheel 14 and to means for regulating the throw of the piston and plunger rods.

The object of' the invention is to provide an etlicient means for reciprocating the pis-- tons of the pump, such as two chain connec- 15 resting upon the sub-base 13. The subbase 13 is recessed as at 16 below the sprocket wheel 14 to permit the chain to ass around said s rocket wheel and the sha t 12 of said sproc :et wheel is journaled in the sides of the being the elevating chain and the other the housing 15. Secured to the ends of the pulling-down chain.

Another object of the invention is to provide an adjustable stop common to both plunger rods and bymeans of which the dis charge from the two cylinders is regulated.

Preceding a more detailed description of the invention, reference is made to the accompanying drawings, of which- Figure 1, is an enlarged elevation partly in section of a double cylinder pump constructed in accordance with said invention. Fig. 2, is a sectional elevation of the upper portion of the pump on the line 2 2 of Fig. 3. Fig. 3, is a sectional elevation on the line 3 3 of Fig. 2. Fig. 4, is a sectional view on the line 44 wheels 9 are mounted, are intermeshing gear wheels 17 and 18. The shaft of the smaller handle 19 and thus the chain wheels9 9 are actuated to drive the chains 8 and 8, chain 8 to elevate a plunger rod, and chain 8 to pull down the plunger rod previously elevated. The spur wheel 18 is fixed -to shaft 9 while the crank handle 19 and the gear 17 are connected together and are loose upon their shaft.

In the operation of the machine, the crank handle 19 is turned to elevate one of the pistons through the chain 8 and to pull down of Fig. 2. Fig. 5, is a section on the line 5 5 the other piston through the chain 8 as beof Fig. 3. tore indicated. The pistons 6 are of the well-known valve type, and the descending piston elevates the oil into the chamber 20 in ythe sub-base 13, from whence it is discharged through the outlet pipe 21. It will be understood that the pistons each draw into their respective cylinders the oil through the valve 5 when ascending, and that when descending, the oil previously drawn inA to one or the other cylinder is forced above thepiston to be subsequently drawn into the chamber 20 and forced out through the discharge pipe 21. The adjustment by which the throw ofthe pistons is regulated, and the pro er and accu- In a detail description of the invention, similar reference characters indicate corresponding parts.

The two cylinders 1 1 of the pump are mounted on a hollow base 2 and are supplied through a pipe 4 within the base, said pipe being connected to a suction pi e 3 leadlng to the source of supply, and t e pipe 4 having seated in the ends lying within the cylinders, suction valves 5. The pistons 6 are connected to plunger rods 7 extending through a sub-base 13 which is mounted upon the u per ends of the cylinders. Conlieends of the plunger rods 7 is a shafts 9 upon which the upper sprocket of these gear wheels is turned by a crank mounted upon a shaft 12 within a housing rate measures are taken from t e cylinders,.

is obtained through means of a center rod 22 which is mounted on the sprocket housing 15 and has its upper end screw-threaded for the .necessary length and engaged by a center piece 23 secured to the head 10 of the framework, so that the said central rod is properly sipported at its top and bottom. 24 1s an a just'able collar on said center rod; this collar is screwed to the proper point on the central rod 22 and is then made tight by means of a set screw'25. The iange on said collar is in the path ofthe inner ends of the adjustable ieces 10', and the plunger rods are limited 1n their movements by engaging this stop collar,- and during which movement the contents of the cylinders are accurately discharged. To discharge less Athan the full contents of each cylinder, say for example, a quart, or a int, other stops 27 and 28 are employed; t ese stops are fixed in the proper positions for the-extended portions 27/ and 28 to be engaged by the inner extended portions of the adjustable pieces 10. The lower end of the central rod 22 has fixed to it an indicating device 26 which is moved to a point on the sub-base 13 to indicate 1 Qt or l Pt. Then the said pointer 26 is moved to one of these positions, the stops 27 or 28 are moved to a corresponding point or in alinement with the inner end of one of the adjustable pieces 10.

I claim:

1. In a self-measuring oil pump, the combination of two cylinders, pistons with plunger rods therein, adjustable pieces on the upper ends of said plunger rodsLa pulling-down chain connected to the inner ends of said adjustable pieces, a sub-base, a sprocket wheel mounted in the sub-base and around which said pulling-down chain passes, a lifting chain, the ends of which are attached to the upper ends of the plunger rods, sprocket Wheels mounted in the top of the machine and over which said last-named chain passes,

a crank handle, and gearing operated by said wheels are rotated to reciprocate the plunger rods and therewith the istons in the cylmders through the'pull andlift chains as specified.

2. In a self-measurin oil pump, a supporting frame having a hea ,two pump cylinders, two pistons and plunger rods, a sub-base above the cylinders having a sprocket housing thereon, an adjustable piece secured to the upper end of ezlplunger rod, a pullingdown chain having its ends secured to said adjustable pieces, a sprocket wheel mounted in the sprocket housing on the sub-base and around which said pulling-down chain passes, a lifting chain secured to the up er ends of the plunger rods, sprocket whee s mounted in the head of the machine and over which said lifting chain passes. intermeshing gear wheels on the shafts of said sprocket wheels, and a crank handle to initially drive one of said gear wheels to transmit the lifting and pulling power to said chains.

3. In a self-measuring oil pump, two pum cylinders, a piston and plunger rod in eacli pump cylinder, a lifting chain having its ends attached to the upper ends of' the plunger rods, adjustable pieces carried on the upper ends of the plunger rods, a pulling-down chain having its ends attached to the adjustable pieces, said pulling-down chain extending downwardly from the ends of the plunger rods, and means to actuate the lifting chain to elevate a plunger rod,v and the pullingdown chain therewith, and whereby the other plunger rod is lowered.

In testimony whereof I affix my signature, inpresence of two witnesses.

JOHN B. DAVIS.

Titnessesz li. J. MCCARTY, C. M. THEOBALD.

crank handle and by which said sprocket- 'A, 

